H

handle::A unique integer that Windows uses to identify an object created or used by an application.

header file::An external source file that contains commonly used declarations and definitions. The #include directive is used to insert the contents of a header file into a C source file.

hexadecimal::The base-16 numbering system whose digits are 0 through F. The letters A through F represent the decimal numbers 10 through 15. It is often used in computer programming because it is easily converted to and from binary, the base-2 numbering system the computer itself uses.